In former versions of CN auto sync to simplenote when closing the program was possible for me. Now I updated to 3.11 (new installation) and I can't setup the function. Manual sync to simplenote and sync by time (i.e. five minutes) is possible. What can I do to archive auto sync everytime when I close the programm?

By "closing" the program do you mean closing to tray or exiting?Actually CN never supported this function. I wonder how it could have worked for you in past versions. It's always been either manual or every 5-min sync.

By "closing" the program, I mean exiting. And you are right: auto sync every time when I close the program, never was possible before. Sync started every five minutes (sorry for my question). I only realised the delay when I was working with pc and laptop nearly at the same time to test, if sync is working. Normally I don't do this. So CintaNotes does a really good job. Thank you.